Elevator-door-lock-control mechanism



Aug. 14, 1923. 4 1,464,871

W. H. HARTMAN ELEVATOR DOOR LOCK CONTROL MECHANISM Filed Nov. 23. 1920 2Sheets-Shet 1 Aug. 141923.

W. H. HARTMAN ELEVATOR DOOR LOCK CONTROL MECHANISM 2 sneets-snet 2 FiledNov. 23

11v VENTOR G/i ffffzrim %w ATTORNEYS W1 TNESS Patented Aug. 14,- I923.

siren stares than ATENI'H this.

WILLIAM- H. HARTMAN, F LOS ANGELES, CALIFORNIA, ASSIGN'OR TO RANDALLCONTROL AND'HYDB-OME'IRIC COEPORATION,-OFLOS ANGELES, CALIFORNIA, A

CORPORATION OF CALIFORNIA.

ELEVATOR-DOORLOCKCONTBOL lVIECI-IANISM.

Application filed November T 0 all whom it may concern Be it known thatI. IVILLIAM H; HART- MAN, a citizen of the United'States, and a residentof Los Angeles, county of Los Angeles, and State of California, have invented a certain new and useful Elevator- Door-Iloclr-Control Mechanism,of which I the following is a specification.

The invention relates to elevator shaft door locks, and particularly tomeans for operating the lock.

The invention possesses other advantm gcous features, some of which,with the foregoing, will be set forth at length in the tollowingdescription, where I shall outline in full that form of the inventionwhich I have selected for illustration in the drawings accompanying andforming part of the present specification. In said drawings I have shownone form of the apparatus of my invention, but it is to be understoodthat I -do notlimitniyself to such form since the invention. asexpressed in the claims, may beembodied in a pluralityofforms."

Referring to said drawings: Figure 1 is an elevation of a portion of anelevator car, partly in section, with the apparatus of my inventioninstalled thereon. Figure 2 is an elevation of the door lock withthefront plate removed, showing the bolt on the door in locked engagement.

Figure 3 is an elevation of a portion of the. mechanism on the car inengagement with the lock, whichjhas been moved to open position.

Figure 4 is a view, partly sectional, from the bottom of the car, ofthedetent for the controlling handle.

The invention is applicable to elevators, operating in shafts having aplurality of sliding doors, one arranged at each floor. A lock securedto the structure of the ele- 23, 1920. Serial No. 425,969.

.vator shaft, is arranged at each door, and each door is provided with abolt 2, which engages the lock, to hold the door in locked pos1tion. Thelock is enclosed in a case 3, into which the bolt extends, and isprovided with a latch lever 4:, which engages a notch in the bolt. Thelever I is usually of the loell crank variety, one arm: 5 of whichprojects through a slot in the top of the casing 3; Pivoted to thecaseand engaging the end of arm 5 is a lever 6, having a counterweight 7placed to one side of the pivot, so that the lever 6 is normallyinclined in such position to hold the latch 4 elevated and the boltlocked. The lever 6 is provided on its free end with a pin or projection8, which projects into the elevator shaft and by engagement with whichthe lever 6 is rocked.

In the arrangement shown in 2, movement of the pin 8 to the right,-depresses the latch .4, so that the bolt 2 may be withdrawn. Means areprovided, which move into position as the bolt is withdrawn for lockingthe latch in the depressed position and holdinn it in such positionuntil the bolt is again inserted into the casing. Pivoted withinthe'casing is a weighted lever 9, having a notch 13 therein, whichengages a pin 14 on the depressed latch when the bolt is withdrawn. A.second lever 15 is provided with a notch 16, which engages a pin 17 onthe arm 5 as the bolt is withdrawn. One of these levers is suiticient tolock the latch in open position, but I prefer to employ both, so thatthe proper operation of the lock will be assured in the event of thefailure of one of the levers to operate. When the bolt is reinsertedinto the casing, these levers are moved out of contact with the latch,which is then moved into engagement with the bolt by the overbalancingweight of the mass 7. Means are carried by the elevator car which moveinto engagement with the pin 8, as the car reaches a position at a floorand this means is then actuated to move the lever 6 to release the bolt.Mounted on the elevated car, by the parallel levers 18, is asubstantially vertically disposed actuating member 19, having asubstantially vertical slot 21 therein, flaring outwardly at the top andbottom, to insure the positioning of the pin in the slot.- The levers 18are of such form that vertical movement of the outer of the car floor.

car, where it is connected to the lever 23, plvotedto the car floor.Connected to the lever 23 is a spring raised pedalQ l, which,

when depressed, moves the member 19 laterally;

lVhenthe car is stopped at a floor, the

operator depresses the pedal 2 1, thus unlocking the door, which maythen be opened byhand or by any poweroperated means. The initial openingmovement of the door locks the latch ope and the operator may thenremove his foot from. the pedal. When J the door is subsequentlymoved tofull closed position, the latch locking levers are released and thelatch and actuating member 19 re turn to normal position. i

Means are provided for preventing the operation of the car during thetime that the shaft door is unlocked, or in other viords, during thetime that the rod 22 is I in depressed position. The movement of the ian is controlled by the lever 25, to which is secured a gear 26'engaging the vertically movable rack 27. Secured to and movable with therack is a rod 28, having a neck 29 of less diameter than the rod, whichpreferably disposed adjacent the under side Slidably mounted on theunder side of the car floor is a slide 31, having a bifurcated endprovided with a tapering slot, as shown in'l igfl. ll hen the slide 31is moved to the left, the rod 28 is freeto move, but when the slideEllis n'ioved to the right, it forms a barrier for the shoulders ateither side of the neck 29, thereby precluding movement of the rod 28.It is understood that when the lever i moved to neutral position, thatthe neck is disposed in the plane of the slide and when in this positionmay be engaged by the slide v31, which then 'operatesas a barrier. Theslide 31 is connec ed to the rod 22b the bell crank lever and'theadjustable link 132% andthe link .64, sojthat d ressionot' the rod 22locks the controlle-ser in neutral position. The control lever isrelieved of the weight of the rack and rod by the counterbalancin5 lever36.

I claim:

l. The combination with an elevator shaft door,;o1 a bolt on said door,a lock casing lock, engaging said latch. and h-olding it in engagemi-intwith the bolt, means for moving the levcrto disengage the latch, andmeans for holding the latch in disengag red position.

2%. ln combination, an elevator eer,

a lock for the door, a lever arrangeril entirelyexternally of the lockand associated with one of the moving parts thereof i'or normallyholding; it in closed position. means adapted to be carried by theelevator car movable into engagement with the lever for opening; thelock, and means operative upon the opening of the door for latcl-iingthe lo xlrin open position. 7 V

41-. In combination, an elevator sl' 1 door, a lock for the door, a bolton door ar ranged to engage the lock, weighted lever arranged entirelyexternall lots: and adapted to hold the loci rmally in gagement. *llillthe bolt, a ijection on the lever, a slotted actuating m V adapted to becarried on an elevator cz said projection, means for UHF-1111.51: sai 1her to disengage the lock from the bolt, air means operative by theremoval of the M from the lo air for holding the'locl; in disengagedposition. i

ln combination, an elevator sha door, a motor driven car, a motorcontroller on the car, a bolt for the door, "a latch on the elevatorshaft for engaging the bolt, a lever arranged entirel externally of thelock for L bol l1 normallyholding the latch in "closed posi-' tion, aprojection on said lever, a slotted actuating member on the car adaptedto engage said projection, mechanism carried by the car for moving saidmember to open the lock, and means operative simultaneously with saidmechanism for lockingthe mot-or controller in neutral position.

In testimony whereof, I have hereunto set my hand. V l/VILLIAM H.HILRTMAN,

